EP0780146B1 - Appareil chauffé à la vapeur pour l'évaporation et l'épaississement de liquides - Google Patents

Appareil chauffé à la vapeur pour l'évaporation et l'épaississement de liquides Download PDF

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Publication number
EP0780146B1
EP0780146B1 EP96119825A EP96119825A EP0780146B1 EP 0780146 B1 EP0780146 B1 EP 0780146B1 EP 96119825 A EP96119825 A EP 96119825A EP 96119825 A EP96119825 A EP 96119825A EP 0780146 B1 EP0780146 B1 EP 0780146B1
Authority
EP
European Patent Office
Prior art keywords
liquid
plate
holes
distribution
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96119825A
Other languages
German (de)
English (en)
Other versions
EP0780146A1 (fr
Inventor
Jürgen Dipl.-Phys. Korres
Hans Dipl.-Ing. Eggert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Balcke Duerr Energietechnik GmbH
Original Assignee
Balcke Duerr Energietechnik GmbH
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Publication date
Application filed by Balcke Duerr Energietechnik GmbH filed Critical Balcke Duerr Energietechnik GmbH
Publication of EP0780146A1 publication Critical patent/EP0780146A1/fr
Application granted granted Critical
Publication of EP0780146B1 publication Critical patent/EP0780146B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C13—SUGAR INDUSTRY
    • C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
    • C13B25/00—Evaporators or boiling pans specially adapted for sugar juices; Evaporating or boiling sugar juices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/008—Liquid distribution
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation

Definitions

  • the invention relates to a device for evaporating or thickening Liquids with at least one heat exchanger that the liquid from above is given up by a liquid distribution such that the liquid as Falling film on the inner surface of vertical channels inside the Heat exchanger flows down and in the cross and / or countercurrent Steam is heated, the liquid distribution being a trough-shaped Liquid distributor includes.
  • Devices of the type described above are from DE-A 1 519 742 and DE-A 1 519 637. These each show a steam-heated one Device for evaporation or thickening of liquids with at least a heat exchanger, which the liquid from above through a Liquid distribution is given in such a way that the liquid as a falling film the inner surface of vertical channels within the Heat exchanger flows down and in the cross and / or countercurrent Steam is heated, the liquid distribution being a trough-shaped Liquid distributor includes.
  • the one to be evaporated or thickened Liquid of the steam-heated device is applied from above and flows through a relaxation room in which to be evaporated or thickened Leak liquid vapors.
  • the invention is therefore the Task based on a steam-heated device of the above described way for evaporation or thickening of liquids to further develop that inadmissible thermal at low throughputs Loads on both the liquid and the heat exchanger avoided become.
  • the one to be evaporated or thickened occurs Always pour liquid out of all holes in the pre-distribution plate.
  • the exiting rays strike the one below the pre-distribution plate arranged distribution plate on that with holes of larger diameter provided and arranged such that each of a hole of the Pre-distribution sheet of liquid jet emerging at least partially on one existing web occurs between the holes of the distribution plate.
  • the distribution plate is covered over its entire surface with a thin Liquid film covered, so that the liquid from all holes of the Distribution sheet emerges.
  • the resulting liquid jets hit due to the offset of the lower distributor plate to the upper distributor plate again on existing between the holes of the lower distribution plate Ridges at least partially, so that the second distribution plate is also complete is covered with a thin film of liquid.
  • the device according to the invention can thus with only a tenth of Minimum throughput of conventional devices can be operated without that the thermal load on the liquid exceeds the permissible level. In addition, constructively complex and energy consumption increasing circulations of the liquid avoided.
  • the distribution plates are provided with about 5000 holes per m 2, each with a diameter of 10 mm, and are arranged at a distance from one another of about 10 to 20 mm .
  • the Device for evaporating or thickening liquids F several Plate heat exchangers 1a, 1b, 1n, each of which the liquid F from above is given up, the liquid F in a known manner approximately vertically runs through channels of the plate heat exchangers 1a, 1b and 1n.
  • Such plate heat exchangers 1a, 1b, 1n are known, they were shown in FIG. 1 only indicated schematically.
  • the illustration also shows that the plate heat exchanger 1a, 1b, 1n (in the exemplary embodiment in cross flow) with Steam D are heated to evaporate or thicken the liquid F to achieve.
  • running out of the plate heat exchangers 1a, 1b, 1n Condensate K is indicated schematically in Fig. 1.
  • a pre-distribution which in the exemplary embodiment consists of a bowl-shaped liquid distributor 4.
  • This liquid distributor 4 maintains a constant liquid level, as indicated in Fig. 1.
  • the liquid distributor 4 has in the embodiment a serrated edge through which the overflowing liquid arrives at a pre-distribution plate 5.
  • Below this pre-distribution plate 5 at least two spaced apart and parallel Distribution plates 6 and 7.
  • FIG. 2 shown enlarged.
  • This illustration shows the pre-distribution plate 5 which is constantly supplied with liquid F and which is provided with a large number of holes 5a from which the liquid emerges in the form of liquid jets S 5 . Only one such liquid jet S 5 is shown in FIG. 2.
  • This liquid jet S 5 strikes the distributor plate 6 arranged at a distance below the pre-distributor plate 5, specifically in the region of a web which results between the holes 6a of the distributor plate 6.
  • the liquid impinging on the distribution plate 6 in the form of the liquid jet S 5 is distributed over at least two holes 6a of the distribution plate 6 adjacent to the impact point, from which in turn liquid jets S 6 emerge, which in turn are on webs between the holes 7a of the lower distribution plate 7 hit.
  • the resulting multiple division of the liquid F into a plurality of liquid jets S 5 and S 6 leads to a uniform distribution of the liquid F to be evaporated or thickened, which reaches the entire surface of the uppermost plate heat exchanger 1a in the form of the liquid jets S 7 .
  • the pre-distribution plate 5 is provided with 500 to 1000 holes per m 2, each with a diameter of 6 mm, while the distribution plates 6 and 7 are provided with about 5000 holes per m 2, each with a diameter of 10 mm.
  • the distance between the two distribution plates 6 and 7 is about 20 mm.
  • Liquid F is applied so that even with low liquid throughputs none inadmissible within all plate heat exchangers 1a, 1b, 1n high thermal loads on the liquid F occur.
  • the device can thus with very low throughputs without an expensive and circulating the liquid F increases the energy consumption become, without the thermal load of the liquid F the permissible Dimension exceeds.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (2)

  1. Dispositif chauffé à la vapeur pour l'évaporation ou l'épaississement de liquides, par exemple d'eau de mer ou de jus de betteraves sucrières, comprenant au moins un échangeur de chaleur qui est conçu sous la forme d'un échangeur de chaleur à plaques (1a, 1b, 1n) et auquel le liquide est amené par le haut par l'intermédiaire d'un moyen de répartition de liquide comprenant un répartiteur de liquide (4) en forme de cuvette, de façon qu'à l'intérieur de l'échangeur de chaleur à plaques (1a, 1b, 1n) le liquide s'écoule vers le bas sous la forme d'un film descendant sur la surface intérieure de canaux verticaux et soit ainsi chauffé par de la vapeur en courants croisés et/ou à contre-courant, entre le dessus de l'échangeur de chaleur à plaques (le plus haut) (1a) et le répartiteur de liquide (4) étant disposées, à distance les unes des autres et parallèlement les unes aux autres, une tôle de pré-répartition (5) constamment exposée au liquide et pourvue d'une multitude de trous (5a) et au moins deux tôles de répartition (6, 7) pourvues d'un ensemble perforé constitué de trous (6a, 7a), la tôle de pré-répartition (5) et les tôles de répartition (6, 7) s'étendant sur toute la section transversale de l'enceinte, le diamètre les trous (6a, 7a) des tôles de répartition (6, 7) étant supérieur au diamètre des trous (5a) de la tôle de pré-répartition (5), et les trous (5a, 6a, 7a) étant orientés les uns par rapport aux autres de façon que les jets de liquide (S5, S6) sortant par les trous (5a, 6a) frappent au moins partiellement des isthmes situés entre les trous (6a, 7a) de la tôle de répartition (6, 7) placée en dessous.
  2. Dispositif selon la revendication 1, caractérisé en ce que, dans le cas d'une tôle de pré-répartition (5) pourvue de 500 à 1 000 trous par m2 de chacun 6 mm de diamètre, les tôles de répartition (6, 7) sont pourvues d'environ 5 000 trous par m2 de chacun 10 mm de diamètre et sont disposées à une distance mutuelle d'environ 10 à 20 mm.
EP96119825A 1995-12-21 1996-12-11 Appareil chauffé à la vapeur pour l'évaporation et l'épaississement de liquides Expired - Lifetime EP0780146B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29520263U 1995-12-21
DE29520263U DE29520263U1 (de) 1995-12-21 1995-12-21 Dampfbeheizte Vorrichtung zur Verdampfung oder Eindickung von Flüssigkeiten

Publications (2)

Publication Number Publication Date
EP0780146A1 EP0780146A1 (fr) 1997-06-25
EP0780146B1 true EP0780146B1 (fr) 2001-01-24

Family

ID=8017027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96119825A Expired - Lifetime EP0780146B1 (fr) 1995-12-21 1996-12-11 Appareil chauffé à la vapeur pour l'évaporation et l'épaississement de liquides

Country Status (2)

Country Link
EP (1) EP0780146B1 (fr)
DE (2) DE29520263U1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19729515C1 (de) * 1997-07-10 1999-02-04 Balcke Duerr Gmbh Verdampfer zum Aufkonzentrieren von Flüssigkeiten
DE19729514C1 (de) * 1997-07-10 1998-11-19 Balcke Duerr Gmbh Dampfbeheizte Vorrichtung zur Verdampfung oder Eindickung von Flüssigkeiten
CN101898045B (zh) * 2010-06-02 2013-01-02 苏州桥立环境科技有限公司 降膜式蒸发装置的料液分布成膜器
WO2015025334A2 (fr) * 2013-08-21 2015-02-26 Vivek Verma Évaporateur modulaire à pulvérisation
WO2018149776A1 (fr) 2017-02-14 2018-08-23 Covestro Deutschland Ag Dispositif de distribution notamment destiné à un échangeur de chaleur à film tombant et son utilisation
BR112021018228A2 (pt) * 2019-03-14 2022-02-01 Vivek Verma Método, processo e dispositivo para sistema de evaporação de temperatura muito baixa
CN111701261A (zh) * 2020-06-22 2020-09-25 天津科技大学 降膜蒸发器导气布液装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1519637C3 (de) * 1966-11-10 1974-01-17 Braunschweigische Maschinenbauanstalt, 3300 Braunschweig Vorrichtung zur Aufrechterhaltung einer gleichmäßigen Flüssigkeitsverteilung auf die Heizrohre von Fallstromverdampfern, insbesondere für die Zuckerindustrie
DE1519742C3 (de) * 1966-11-22 1978-06-15 Wiegand Apparatebau Gmbh, 7500 Karlsruhe Vorrichtung zur gleichmäßigen Verteilung der Flüssigkeit auf die Heizrohre eines Fallstromverdampfers
DE1692967B2 (de) * 1968-03-15 1977-03-24 Maschinenfabrik Buckau R. Wolf Ag, 4048 Grevenbroich Fallstromverdampfer fuer die zuckerindustrie
EP0153974A1 (fr) * 1984-03-09 1985-09-11 Waterkotte Klemens Distributeur de mélanges gaz-liquides consistant en un moyen de dispersion se composant d'un ou de plusieurs gaz avec la phase dispersée qui y est distribuée et formée d'un ou de plusieurs liquides

Also Published As

Publication number Publication date
DE59606378D1 (de) 2001-03-01
EP0780146A1 (fr) 1997-06-25
DE29520263U1 (de) 1996-02-08

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